Tool for boring wells



(No Model.)

H. O. SAFFOR D.

TOOL FOR BORING WELLS.

INVENTOR envy Cl Safiaml.

Patented May 19, 1885.

ATTORNEYS N. PEYERs/Pnmwmm n mr. Washington. D. c

UNITED STATES PATENT OFFICE.

HENRY C. SAFFORD, OF BROOKLYN, NEW YORK.

TOOL FOR BORING WELLS.

SPECIFICATION forming part of Letters Patent No. 318,034, dated May 19,1885.

Application filed September 11, 1884.

T 0 all whom it may concern-.-

Be it known that I, HENRY G. SAFFoRD, a citizen of the UnitedStates,residin'g at Brooklyn, in the county of Kings and State of NewYork, have invented new and useful Improvements in Tools for BoringWells, of which the following is a specification.

This invention relates to improvements in tools for boring wells; and itconsists in the combination, with the tool, of cleaning apparatus forremoving the material of excavation without drawing the tool from theborehole, the same being washed out by passing a stream of water throughcleaning-pipes attached to the tool.

The invention also consists of disintegrating-tubes for drilling in clayor similar material.

In the accompanying drawings, Figure 1 is a side elevation of thedevice. Fig. 2 is a, front elevation of the same.

Similarletters indicate corresponding parts.

In the drawings, the letter A indicates the coupling, bored out andtapped at a to receive the cleaning-pipe B, which is firmly screwed intothe same.

0 is another cleaning-pipe, provided with threads 1;, and is screwedinto a hole, G, provided with threads, in the bottom of the coupling A.l

D is the drill, screwed in the bottom of the coupling A.

To the drill D are attached expanding reamers d d. The reamers consistof elbowlevers, which are pivoted by means of bolts 6, and can be turnedabout the same, so as to vary their cutting diameter by means of therope f, connecting the two eyes 9 of the ex panding reamers d d, andconnected ;with a rope, h, passing to the surface of the earth when thetool is used.

it" are blocks secured to the drill D, and act as stops for theexpanding toes.

r are slots in the drill D, in which the toes d d slide.

j are disintegrating-tubes, secured to the blade of the drill by meansof the pins 70, entering the drill D, and the clamps l, secured vationupward and out of the bore-hole.

(No model.)

to the drill D by the bolts m and pressed against the disintegratingtubes j by the bolt 02..

After the drill D is set in motion, and when a sufficient quantity ofthe excavated material has accumulated, water is forced through the pipeB. Passing in the coupling A, the water passes in the bottom of thebore-hole through the pipe 0, and washes the material of exca- Dependingon the material of excavation, the water may be kept runningcontinuously.

When sinking a hole in clay or similar earths, the drill D alone wouldhave no further effect than to separate the material, which would closeup again after each blow of the drill. To prevent thisthedisintegrating-tubes j are attached to the drill D. On the downwardmotion of the drill Dthe earthy material is forced up thedisintegrating-tubes j, and leaves at the top of the same as bars of, toa certain extent consistent, material, which are easily washed up by thewater passing through the cleaning'pipes B O, the cleaning-pipe ending alittle above the top of the disintegratingtubes j. I

The object of the expanding toes d d is to form a hole larger than thedrill D would by itself, thus preventing the drill from becoming stuckin the bore-hole, and also to enable the bore-hole to be lined as thedrilling proceeds.

When it is desired to withdraw the drill after lining, the expandingtoes d d are lowered, by means of the ropes h and f, until they liewholly within the edges of the drill D, after which the drill can beremoved in the usual manner.

I am aware that a well boring drill has heretofore been provided withexpanding bits or reamers, the same being connected by a rope with adrill-rod, so that when said rope is shortened or contracted by contactwith water in the bore-hole the reamers are projected beyond the drillto enlarge the hole made by the latter.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, substantially as here- In testimony whereof I havehereunto set inbefore described, with the drill D, of the my hand andseal in the presence of two subcleaning-pipes B O and the coupling A.scribing Witnesses.

2. The combination, substantially as here- 5 inbefore described, withthe drill 'D, of the HENRY G. SAFFORD. [L. 8.]

disintegrating-tubes j j.

3. The combination, substantially as here- Witnesses: inbeforedescribed, with the drill D, of the E. F. KASTENHUBER, cleaning-pipes BC and the disintegrating;- WILLIAM MILLER.

10 tubesjj.

